From 9adaeb545214b0236fb6cee72c68ecda8a52605c Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Tue, 16 Dec 2014 21:57:55 +0000
Subject: MFC 273053: Decode the arguments passed to _umtx_op().  In
 particular, decode the opcode.

---
 usr.bin/kdump/kdump.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'usr.bin/kdump/kdump.c')

diff --git a/usr.bin/kdump/kdump.c b/usr.bin/kdump/kdump.c
index 8076ae5..673db53 100644
--- a/usr.bin/kdump/kdump.c
+++ b/usr.bin/kdump/kdump.c
@@ -57,6 +57,7 @@ extern int errno;
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/sysent.h>
+#include <sys/umtx.h>
 #include <sys/un.h>
 #include <sys/queue.h>
 #include <sys/wait.h>
@@ -1187,6 +1188,26 @@ ktrsyscall(struct ktr_syscall *ktr, u_int flags)
 				ip++;
 				narg--;
 				break;
+			case SYS__umtx_op:
+				print_number(ip, narg, c);
+				putchar(',');
+				umtxopname(*ip);
+				switch (*ip) {
+				case UMTX_OP_CV_WAIT:
+					ip++;
+					narg--;
+					putchar(',');
+					umtxcvwaitflags(*ip);
+					break;
+				case UMTX_OP_RW_RDLOCK:
+					ip++;
+					narg--;
+					putchar(',');
+					umtxrwlockflags(*ip);
+					break;
+				}
+				ip++;
+				narg--;
 			}
 		}
 		while (narg > 0) {
-- 
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